/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.evaluation;

import proguard.classfile.Clazz;
import proguard.classfile.attribute.CodeAttribute;

/**
 * This InstructionVisitor evaluates the instructions that it visits.
 *
 * @author Eric Lafortune
 */
public interface BranchUnit {
    /**
     * Sets the new instruction offset.
     */
    public void branch(Clazz clazz, CodeAttribute codeAttribute, int offset, int branchTarget);

    /**
     * Sets the new instruction offset, depending on the certainty of the conditional branch.
     */
    public void branchConditionally(Clazz clazz, CodeAttribute codeAttribute, int offset, int branchTarget,
        int conditional);

    /**
     * Returns from the method with the given value.
     */
    public void returnFromMethod();

    /**
     * Handles the throwing of an exception.
     */
    public void throwException();
}
